题目内容

常见的密封装置有哪些？

A. 垫片密封
B. 密封圈密封
C. 填料密封
D. 端盖密封

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The number of electoral votes for 50 states and Washington D.C. is ___________.

A. 435
B. 438
C. 535
D. 538

To get elected as the President, a candidate has to get at least __________ votes.

A. 269
B. 270
C. 538

According to the US Constitution, no President is allowed to stay in the White House for more than ________ years.

A. 4
B. 8

Which of the following can also be called as a swing state?

A. a red state
B. a purple state
C. a blue state
D. a safe state