When Richard said，“You are much more agreeable and prettier now，Joan’s face turned red at the unexpected_____.

A．command

B．comparison

C．compliment

D．contribution

下列关于四等水准测量的水准尺的叙述中，（）是错误的。

A.通常采用一对双面水准尺

B.水准尺黑面尺底注记值为0

C.水准尺红面尺底注记值为0

D.水准尺红面尺底注记值相差10cm