如果速度配平系统有故障，哪些注意灯会亮（）。
A.速度配平故障灯、马赫配平故障灯、自动驾驶脱开灯；
B.速度配平故障灯、安定面失去配平故障灯和自动驾驶脱开灯；
C.主注意灯、飞行控制警告灯和速度配平故障灯；
D.主注意灯、飞行控制警告灯、速度配平故障灯和失速警告灯。
关于DNA连接酶的作用正确的是（）
A.可催化dNTP的5’-磷酸与DNA链的3’-OH相连接
B.催化的反应在原核细胞中需要消耗ATP
C.在DNA复制、修复、重组和剪接中均起缝合缺口的作用
D.合成冈崎片段
E.连接两个单独存在的DNA单链
机动车遇有前方车辆排队等候或者行驶缓慢时，不得（）。
A.借道超车
B.占用对面车道
C.穿插等候的车辆
D.掉头
阅读下面短文，掌握其大意，然后从21~40各题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。 When I was a law professor, a student reported that I made an error in grading his exam by giving him too many points. He was and after thanking him for his honesty, I changed the in my records. His beaming (欢笑的) face turned to “You’re lowering my grade?” he said angrily. “I would never have come in ……” He didn’t finish the but it was obvious that his display of honesty was false. He thought he’d have it all—praise and the grade. Several colleagues thought I should have let the higher grade stand all I’d accomplished was to discourage him from being in the future. And every time I tell this , some people agree with this remark. But I can’t see how I could give good for worsening my mistake in grading by undermining (损害) the honesty of all my grades by failing to an error. The grade itself would be a dishonest reflection of his and it would have been to other students. How could I possibly give a a gift of an unearned grade? I know voluntarily reporting an error in one’s favor is , but, like extra change, it’s the thing to do. People with real honesty, hate to give up benefits as mush as anyone else. The difference is that for them a good conscience and reputation is reward enough to give reason for the cost of doing the right thing. Perhaps the student’s grade did discourage him from being honest in the future, but bribing (贿赂) him to be honest so that he does the right thing when it’s cost-free would have him even more. The duty to be honest is right and wrong, not risks and rewards.
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对于铝合金结构，较好的干涉量范围是（）。
A、0、4%
B、0、8%
C、1、5~3、0%
D、10%