I often ______ to the library.[ ]
A. went
B. goes
C. go
答案：C
肌电伪迹与脑电的快波活动或棘波相比，正确的是（）。
A.肌电伪迹时限较长
B.肌电伪迹时限极短
C.肌电伪迹波幅较高
D.肌电伪迹波幅较低
E.应使用高频滤波消除肌电伪迹
The sun heats the earth,（）is very important to living things.
A.that
B.what
C.which
D.where
