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【单选题】
突变使得基因获得某种新功能或者原有功能增强，从而产生新表型。这种突变属于以下哪种类型？A.
功能获得型突变
B.
功能丧失型突变
C.
组成型突变
D.
无义突变
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皮皮学刷刷变学霸
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【简答题】I once experienced an unforgettable trip to Gloucester to see some of the world’s most beautiful and exciting animals in their own habitat(栖息地), the North Atlantic Ocean. After a long trip by bus, we ...
【简答题】(服务员)点菜 take the ____________
【多选题】对于S7-200系列PLC的计数器,下列说法正确的是
A.
计数器只能对外部脉冲进行计数
B.
计数器号范围为0-255
C.
对于加计数器，CU端有上升沿输入时，计数器当前值加1
D.
以上都不对
【简答题】纵断面的设计线是由直线和( )组成的。
【单选题】The waiter seems to be in a hurry to take our order.
A.
服务员好像在催促我们，要看我们的菜单。
B.
服务员好像在催促我们，急着要我们点菜。
C.
服务员似乎很急着要我们点菜。
D.
服务员似乎很急着要看我们的菜单。
【简答题】火眼金睛，选出合适的答案。 1. 当服务员问你：“您准备点菜吗？”可以说： [ ] A. What is it? B. Are you ready to order? 2. “我买两个热狗。”可以说： [ ] A. I'll take two hot dogs, please. B. Two yuan. 3. “橡皮多少钱？”可以说： [ ] A. How much is ...
【简答题】纵断面的设计线是由（）和（）组成的
【判断题】After whale watching from boats or shore, a few companies are now offering the possibility of actually swimming with whales in the wild.
A.
正确
B.
错误
【单选题】Section B Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you ...
A.
By research with commercial whale watching tour.
B.
By research with navy marine.
C.
By research with whaling hunting.
D.
By research with local fishermen.
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