只用一种试剂就能鉴别AgNO3溶液、乙醇溶液、苯酚溶液、烧碱溶液、KSCN溶液，该试剂是（ ）A．溴水 B．盐酸 C．石蕊
根据短文内容，从各题所给的A、B、C、D四个选项中选出最佳选项。 Tom woke up on Monday morning. He felt 1 . He always felt sick on Monday mornings. He had to go to school
阅读《国人失掉诚信了吗》一文，回答文后问题。 国人失掉诚信了吗？ 叶开 ①在网上买了一台二手电脑，拿到后开机上网，装应用软件，用了两天，
任务型阅读 Co-operation(合作)is always needed when we make a project that the teacher gives you. First, discuss all we would like to do with our classmates. Choose one of the members to write
For a long time they walked without saying word. Jim was the first to break silence. A．the; a B．a; the C．a; /
将下列生物的细胞或结构进行归类 ①大肠杆菌 ②发菜 ③蓝藻 ④酵母菌 ⑤霉菌 ⑥HIV ⑦SARS病原体 ⑧白菜 ⑨胰岛素 （1）真核生物：__________；（2）原
读下图“鲁尔区三大产业就业人数变化示意图”，关于图示内容叙述正确的是( ) A．三大产业的就业人数均发生了很大变化 B．第三产业的就业人数从19
Forgiving someone who has hurt you or let you down is never an easy thing. Several new studies, however, say that it could have a lot of health benefits. When you think of forgiveness, you probably do
B．
D．
