Because of the effects of weather, the rock has an ______ (regular) surface.
Because of the effects of weather, the rock has an ______ (regular) surface.
Because of the effects of weather, the rock has an ______ (regular) surface.
第1题
The main idea of the passage is ______.
A.laughter and physical exercise have similar effects on the human body
B.smile can produce the same effects as laughter
C.pain can be reduced by laughter
D.laughter is the best medicine
第2题
如果出现下述哪种情况,平衡技术(counterbalancing)可能不能满足实验的要求?( )
A.General praetice effects B.Random selection
C.Random assignment D.differential-earryover effects
第5题
A、because; because
B、because of; because of
C、because; because of
D、because of; because
第11题
A、because
B、because of
C、as
D、as of