颊尖偏向远中的牙是（） A.上颌第一双尖牙 B.下颌第一双尖牙 C.上颌第二双尖牙 发布时间：2017-05-24 16:02 │ 来源：www.tikuol.com 题型：单项选择题 A1/A2型题 问题： 颊尖偏向远中的牙是（）A.上颌第一双尖牙B.下颌第一双尖牙C.上颌第二双尖牙D.下颌第二双尖牙E.以上都不是
题型：单项选择题 A1/A2型题 下列实验与对应的图象符合的是（ ）A．①是向一定量的CH3COOH溶液中通入氨气B．②是向等物质的量的HCl和AlCl3溶液中滴入NAOH溶液至过量C．③是对于达到平衡状态的反应，在t1时缩小容器D．④是将PH=2的盐酸和醋酸分别加水稀释 查看答案
题型：单项选择题 A1/A2型题 短文填词。 It is said that each year China consumes 15 billion lunch boxes, _______ which over a half are not q ualified products. These cheap lunch boxes pose threat to h_______. They contain _______ (有毒的) chemicals, which could harm human digestive and nervous systems, and even _______ cancers. Experts suggest that consumers take their own table-ware _______ them rather than use that _______ (提供) by restaurants. If you really need to use a restaurant lunch box, _______ carefully first. Those which break or leak easily, or smell t_______ are not suitable for you to use them _______ your lunch container. If you are careful about what you eat your lunch from , you will also do your part in p______ our environment at the same time. 1.______ 2.______ 3.______ 4.______ 5.______ 6.______ 7.______ 8.______ 9.______ 10.______ 查看答案
反应，在t1时缩小容器