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问题 选择题

下列溶液中Cl-浓度最大的是 [ ]

A．250mL 1mol/L AlCl3溶液

B．300mL 5mol/L KClO3溶液

C．1L 2．5mol/L NaCl溶液

D．200mL 2mol/L MgCl2溶液

答案

答案：D

选择题

Many wild animals don’t have a safe place to live, ___________people are taking away their land and forests.

A．when

B．while

C．because

D．and
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选择题

Doing sports is good for your health, _______ ?

A．is it

B．are they

C．isn’t it

D．aren’t they
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