从域名www．sina．com．cn可以看出，这个站点是中国的一个( )。
A．政府部门
B．军事部门
C．商业部门
D．教育部门
参考答案：C
用括号中词的适当形式填空。
1. Study hard and you _____ (do) well in Russian.
2. —_____ the dictionary _____ (give) to Li Ping?
—No, it is still in my schoolbag.
3. You _____ (keep) the magazine for two weeks, so it _____ (must, return) to the library tomorrow.
4. If it _____ (think) carefully, it will _____ (do) better.
5. My book ________（keep) on that shelf for two days.
以上哪一个变量为标准正态变量（）
A.
B.
C.
D.
E.
