For the practice teaching, the students had to visit some local schools for the ______ of lessons.
A. examination
B. inspection
C. observation
D. investigation
查看答案
下列提法不正确的是：（）
A. 法国实行专门机关监督宪法实施的体制
B. 我国1954年宪法和1982年宪法都有国家主席的设置
C. 新中国历部宪法都规定了由全国人大及其常委会监督宪法的实施
D. 1993年宪法修正案将县级人大的任期由3年改为5年
考虑在一条1000m长的电缆(无中继器)上建立一个1Gbps速率的CSMA/CD网络，假定信号在电缆中的速度为2×108m/s，那么该电缆的最小数据帧长是______。
A. 1250B
B. 1230B
C. 1280B
D. 1220B
Which city is also known as "City of Saints"().
A. Vancouver.
B. Toronto.
C. Ottawa.
D. Montreal.
If Tom wins tomorrow, he ______ thirty races in the past four years.
A. will win
B. has won
C. would have won D. will have won
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