_Along with the letter was his promise_______he would visit me the coming month. A.which B.that C.what D.whether
一个正多边形的一个外角等于它的一个内角的1/3，这个正多边形是几边形？
如图2,已知D为△ABC边BC延长线上一点,DF⊥AB于F交AC于E,∠A=35°, ∠D=42°,求∠ACD的度数.（8分）
下列有关实验操作的叙述错误的是（ ） A. 过滤操作中，玻璃棒应适时搅拌漏斗器 B．蒸发时，不能把蒸发皿放置于石棉网上加热 C．萃取分液时，
有人喜欢数学，有人喜欢小说，有人喜欢散文，有人喜欢诗歌。这说明 A．人人都有兴趣，兴趣也都差不多 B．兴趣是有优劣之分的 C．兴趣是不稳定的
A popular saying goes, “Sticks and stone may break my bones, but words will never hurt me.” However, that's not really true. Words have the power to build us up or tear us down. It doesn't mat
_The work is easy for an expert _______it is difficult for an inexperienced person. A.because B.therefore C.while
完形填空。读下面两篇短文，根据短文内容，从每篇短文后各小题所给的A、B、C三个选项中选出可以填人空白处的最佳答案。 My ___1__problem is that I
