工业合成氨N2+3H22NH3，其正反应为放热反应，如果反应在密闭容器中进行，下列有关说法中正确的是（ ）
A．该反应使用铁触煤作催化剂，目的是为了增大反应速率，同时提高产率
B．升高温度可以增大正反应速率，同时减小逆反应速率
C．达到平衡时，N2、H2、NH3的浓度之比为1：3：2
D．为了提高H2的转化率，可适当提高N2的浓度
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截至目前，个人所得税起征点为（）元。
A.2000
B.2500
C.3000
D.3500
下述哪些是亚急性感染性心内膜炎的临床表现（）
A.杵状指、趾
B.新出现的病理性心脏杂音
C.Rotch征
D.不规则发热
E.Osier结
根据诊治病人的疗效判定等级：“十全为上，十失一次之，十失二次之，十失三次之。十失四为下”见于
A．西周
B．春秋
C．唐代
D．晋代
E．宋代
甲企业受乙企业委托，为乙企业保管一批原材料。后甲企业未经乙企业同意，私自用该原材料换取丙企业的一台设备。甲企业被债权人申清破产并被人民法院受理后，乙企业发现该原材料已被丙企业运走并用于生产，甲企业尚未将交换的设备运回。对此，下列说法正确的是( )。
A．乙企业只能以原材料的直接损失额为限申报债权
B．乙企业可以要求丙企业赔偿损失
C．乙企业可以要求取回被交换的设备
D．乙企业可以要求管理人按原材料的价值赔偿损失
One of the most convenient and cheapest ways to see America is by riding a Greyhound bus. This interstate bus system connects all major cities in the United States, (52) people with frequent and convenient service. The bus system even has an international service (53) makes connection with cities in Canada and Mexico.
Its network even extends to some of the smaller towns and out-of-the-way communities (54) the great interior of the country. Traveling by bus may (55) longer than flying by plane, but the terminals are located in the center of most cities and there is (56) to the downtown area. These buses are comfortable and air-conditioned. They are all equipped with toilets in the rear to (57) the convenience of the passengers, but there are some very severe (58) of conduct which are strictly enforced. On all buses (59) is forbidden and the consumption of alcoholic drinks is not allowed.
(60) bus travel may not be suited to everyone’s taste, it affords budget travelers the (61) to see America in comfort and safety and at a leisurely unhurried pace.
54().
A.for
B.along
C.in
D.from