When the Captain of the Port or Officer in Charge，Marine Inspection issues an order of suspension to the operator of a vessel concerning oil transfer operations，it（）.
A. is always effective immediately
B. includes a statement of each condition requiring corrective action
C. must be in writing before it takes effect
D. All of the above
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一般易燃易爆或有毒介质应选用（）式安全阀。
A. 封闭式
B. 开启式
C. 微开
传染性单核细胞增多症血象的突出变化是（）。
A. 淋巴细胞增多
B. 嗜碱性粒细胞增多
C. 中性粒细胞增多
D. 单核细胞增多
E. 嗜酸性粒细胞增多
辅舒良的规格是（）。
A. 50ug×200喷
B. 50ug×120喷
C. 50ug×140喷50ug×60喷
D. 64ug×120喷
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