下列哪些不是癌前病变A．炎性息肉 B．粘膜白斑 C．交界痣 D．萎缩性胃炎 E．上皮

阅读下面的短文并回答问题，然后将答案写到题后的横线上（请注意问题后的词数要求）。

1 A flood is the overflow of a huge amount of water onto normally dry land. Flooding occurs when the overflowing water submerges (淹没) land, and it causes a lot of problems. It is a cruel and violent expression of water.

2 Floods are often deadly and damaging. They kill lots of people, damage houses and crops, and cause extensive destruction. In broader terms, floods are of two types: natural floods and catastrophic floods. Natural floods are the floods that are caused naturally by the overflow of a huge volume of water, from rivers, lakes, oceans, or by heavy rain or downpours, hurricanes, and so on. Catastrophic floods are floods that are caused by some significant (重大的) or unexpected events, for instance, dam breakages.

3 Heavy rainfall is one of the major causes of floods. The level of water in rivers or lakes rises due to heavy rainfall. When the level of water rises above the river banks or dam, the water starts overflowing, which causes floods. Floods occur more in the regions that ____________.

4 Floods are also caused due to heavy snow melting. Global temperatures are rising due to global warming. The rising temperatures are making the snow caps melt faster. Continuous and fast melting snow raises the level of water in the oceans, which consequently raises the level of water in rivers, and when the level of water in rivers rises above the river banks, it causes floods.

5 Generally, floods occur more in low-lying areas or areas below sea level. One of the main reasons is that rivers flow slowly in these areas. The volume of water increases in low-lying areas. When the level of water rises in these regions, it causes floods.

6 Sometimes floods are caused due to poor dams that cannot hold great volume of water. Therefore, there are always different causes of floods. However, floods caused by humans can be avoided. Humans should let the nature go its own way.

小题1:What is the main idea of the passage? （no more than 5 words）

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小题2:When do floods occur? (no more than 6 words)

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小题3:What causes catastrophic floods? (no more than 8 words)

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小题4:Fill in the blank in Paragraph 3 wit proper words. (no more than 4 words )

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小题5:What does the word “They” (Line 1, Paragraph 2) probably refer to? (1 word)

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使用梯子作业时，在梯子上可以多人同时进行工作。

下列关于民事活动原则，说法不正确的是( )。

A．当事人在民事活动中的地位不平等
B．民事活动应当遵循自愿、公平、等价有偿、诚实信用的原则
C．公民、法人的合法的民事权益受法律保护，任何组织和个人不得侵犯
D．民事活动必须遵守法律，法律没有规定的，应当遵守国家政策

关于SQL查询，以下说法中不正确的是( )。

A．SQL查询是用户使用SQL语句创建的查询

B．在查询设计视图中创建查询时，Access将在后台构造等效的SQL语句

C．SQL查询可以用结构化的查询语言来查询、更新和管理关系数据库

D．SQL查询更改之后，可以以设计视图中所显示的方式显示，也可以从设计网格中进行创建

可以同时阻滞K⁺、Na⁺、Ca²⁺通道的抗心律失常药是

A．奎尼丁

B．胺碘酮

C．维拉帕米

D．利多卡因

E．普萘洛尔