迎送外宾及重要旅客时通常用握手鞠躬微笑（）
A.亲吻
B.敬礼
C.打招呼
D.注目礼迎送
参考答案：D
Many students found the book （）;it provided them with a large amount of information on the subject.
A.informative
B.confusing
C.distracting
D.amusing
BBU设备的BSBA单板中，GTMU单板固定插在（）号槽位。
A、4
B、5
C、6
D、7
