中度煤气中毒的特征是()。
A.呕吐
B.面色苍白
C.口唇青紫
D.全身无力
参考答案:C
Be sure _______ and tell me what happens. [ ]
A. writing
B. wrote
C. writes
D. to write
根据徽商银行收单业务规定,入网一年后对一般商户应确保每季巡检()次。
A.1
B.2
C.3
D.4