供紫露草微核试验的水样,其pH应用1mol/LHCl或1mol/LNaOH溶液调节至()。
A.5.5~8.5
B.4~6.5
C.7~9
参考答案:A
4.--- Will you join us in the dance tonight?
--- I’m afraid not. My uncle is coming by train at 7 pm and I_________him at the station then.
A.will meet
B.am about to meet
C.will be meeting
D.Meet
几月几号是日本敬老节?()
A.10月5号
B.8月15号
C.9月5号
D.9月15号