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【单选题】
下列哪项可引起全身血管舒张A.
交感舒血管神经纤维兴奋
B.
副交感舒血管神经纤维
C.
脊髓背根舒血管纤维兴奋
D.
血管活性肠肽神经元兴奋
E.
交感缩血管神经纤维抑制
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【简答题】Five thousand miles is too far to travel.
【单选题】How fast will a rocket go to escape completely from the Earth's gravity?
A.
Seventy miles per second.
B.
Seven thousand miles per hour.
C.
Twenty-five thousand miles per second.
D.
Twenty-five thousand miles per hour.
【单选题】In f ormal cooperative learning groups ,t hese last from one class period to several weeks and establish for a specific task and involve students working together to achieve ______ learning goals .
A.
variable
B.
shared
C.
different
【判断题】There are three types of cooperative learning groups: f ormal cooperative learning groups ; i nformal cooperative learning groups ; and c oo perative base groups .
A.
正确
B.
错误
【判断题】Once the agreement is settled, the contracts have to be written out and the economic contract should be signed in a n in f ormal way.
A.
正确
B.
错误
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