在对产品进行检验时，产品离眼睛直视最佳检验距离为：（）
A.26CM
B.30CM
C.36CM
D.40CM
参考答案：B
.Peter was___________ tired that he couldn't keep his eyes ___________.
A. so;open
B. too;open
C. so;closed
D. too;closed
