问题
选择题
— Credit cards are ________ useful when travelling.
— True. They save us the trouble of taking too much cash. [ ]
A. finally
B. nearly
C. hardly
D. particularly
答案
答案：D
搜题请搜索小程序“爱下问搜题”
— Credit cards are ________ useful when travelling.
— True. They save us the trouble of taking too much cash. [ ]
A. finally
B. nearly
C. hardly
D. particularly
答案：D
2HCl＋2COCl2。为防止发生医疗事故，在使用前要先检查氯仿是否变质，用下列试剂检验，效果最好的是[ ]