脊柱结核与脊柱转移性肿瘤的区别主要是
A. 结核为持续性疼痛，肿瘤为夜间疼痛
B. X线片表现：脊柱结核一般椎间隙消失，而肿瘤椎间隙正常
C. 结核血沉增快
D. 结核活动受限
E. 病变发生于脊柱的部位、节段不同
______ an umbrella with you in case it rains.
A. Bring
B. Take
C. Hold
D. Fetch
We must observe the local ______ of various nationalities.
A. customs
B. rules
C. habits
D. manners
Whom shall we ______ as our monitor
A. choose
B. select
C. settle
D. stand by
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