选出下列各项中成语（或熟语）使用不规范的一项：（ ） A．最近这些年，像张承志、史铁生这样一些作家，以前都写过现实主义和现代主义的小说，
Keep your child off drugs, ________ it will ________ many serious health and behavior problems. A. or; point to B. or; lead to C. and; point to D. and; lead to
我国劳动力约是美国、欧盟、日本劳动力总和的2倍，因此成为“世界工厂”。但近些年来外商开始抱怨劳动力短缺、工资上涨过快，导致生产成本提高
从二次根式、、、、2、中任选一个，不是最简二次根式的概率是（ ） A． B． C． D．
向含S2﹣、Fe2+、Br﹣、I﹣各0.1mol的溶液中通入标准状况下的Cl2，通入Cl2的体积和溶液中相关离子的物质的量关系图正确的是（ ） A． B． C．
设数列是等差数列，是其前n项和，且，，则下列结论错误的是( ) A． B． C． D．和均为的最大值
Over the last 70 years, researchers have been studying happy and unhappy people and finally found out ten factors that make a difference. Our feelings of well-being at any moment are determined to a
A When I was six, Dad brought home a dog one day, who was called “Brownie”. My brothers and I all loved Brownie and did different things with her. Ore of us would walk her, another would feed
