单轨链式滑车宜选用()材料做钢梁。
A.圆钢
B.槽钢
C.工字钢
参考答案:C
下面加点字的读音完全正确的一项是 ( )
A.罗衾(qīn)玉簟(dàn)抹布(mā)否极泰来(pǐ)
B.暮霭(ǎi)嘈杂(cāo)渐染(jiàn)虚与委蛇(wēi)
C.纶巾(guān)呕哑(ōuyā)靡(mí)费自西徂东(cú)
D.踯躅(zhīzhū)愆期(qiān)悲怆(chuàng)周公吐哺(bǔ)
You can’t complain about being left out ______you don’t make any effort to share your joys and sorrows with others.
A.once
B.unless
C.when
D.though