We were all____ about her safety when sh_爱下问搜题

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问题选择题

We were all____ about her safety when she didn't come back at the usual time. [ ]

A. concerning

B. concern

C. concerned

D. being concerned

答案

答案：C

解答题

把下列命题改写成“若p，则q”的形式，并写出它们的逆命题、否命题、逆否命题.

（1）正三角形的三内角相等；

（2）全等三角形的面积相等；

（3）已知a，b，c，d是实数，若a=b,c=d,则a+c=b+d.

多项选择题 X型题

人力资源群体互补内容主要包括有：（）

A.年龄互补

B.性别互补

C.知识互补

D.能力互补

E.气质互补