Hello. May speak to Jim, please?（） A: AWho are you B: BWho is he C: CWho's that D: DWho is it

Linux中如何查看一个命令使用的帮助信息？（） A: Aman B: Bwhat C: Chelp D: Dwho

ISO选项中，（）是国际标准化组织制定综合类的国际标准。 A: AISO B: BIEC C: CITV D: DWHO

-- Hello, could I speak to Don please? --（） A: AWho are you B: BWhat’s the problem C: CAre you Jane D: DWho’s speaking?

May I use my credit card here?（） A: AYou can't. B: BNo one uses it. C: CI am afraid you can't. D: DWho told you?

下列日常生活用语中，表示电话对话的句子是（） A: AHello, this is Li. May I speak to Chen, please? B: BHold on, please. C: CWould you hold the line, please? D: DWho's calling, please? E: EI'm sorry. I think you have the wrong number. F: FI'm sorry, but Chen is not available to come to the phone right now. May I take a message?

关于网织红细胞计数，错误的说法是（ ） A: A目前国内主要采用显微镜计数法 B: B在显微镜计数法中，玻片法优于试管法 C: C使用Miller窥盘辅助显微镜计数，可提高精密度 D: DWHO推荐用煌焦油蓝染液 E: E国内多用新亚甲蓝染液