19/99＋19/99×2＋19/99×3…＋19/99×10=（）。
A. 1900/99
B. 190/99
C. 190/11
D. 95/9
查看答案
颌骨骨折发生的部位可能是
A. 正中颏部单线骨折
B. 一侧颏孔区骨折
C. LefortⅢ型骨折
D. 下颌颏部粉碎性骨折
E. 双侧髁状突部骨折
Nowadays，a husband tends to__________ ．
A. play a greater part in looking after the children
B. help his wife by doing most of the housework
C. feel dissatisfied with role in the family
D. take a part．time job so that he can help in the home
According to the passage，the fact that many people have poorer hearing when they grow old
A. the must-be result of old age．
B. probably related to the long-time exposure to loud noise
C. because they cannot distinguish high-pitched sounds
D. because their gays aye no longer young
I have to__________ my visit as I‘ll be very busy next week．
A. call for
B. call on
C. call of
D. call in
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