【单选题】教师的行为举止之所以成为学生学习的榜样,对其具有潜移默化的作用,是因为学生具有( )
【简答题】海洋是一个巨大的资源宝库,合理开发海洋资源对于实现可持续发展具有重要的战略意义。盐卤中除含有Mg 2+ 、Cl - 外,还含有少量Na + 、Fe 2+ 、Fe 3+ 、SO 4 2- 和CO(NH 2 ) 2 等。从海水提取食盐和Br 2 以后的盐卤中可以提取MgCl 2 、MgO、Mg(OH) 2 等物质,流程如下图所示 请回答下列问题: (1)从MgCl 2 溶液得到MgCl 2 ·6H 2...
【单选题】注重文明。衣着整洁,禁止穿 ___ 入内。
【单选题】Which of the following parties advocates the independence of Quebec?
D.
Conservative Party of Canada.
【单选题】Which of the following statements about a trade bloc is accurate?
A.
a. The gains from a trade bloc are shared equally by each member.
B.
b. Increased competition within a trade bloc can result in higher commodity prices in the domestic markets of the member countries.
C.
c. A trade bloc may lower firms’ costs by allowing them to exploit economies of scale.
D.
d. A trade bloc can increase the opportunities for domestic business investments but usually repels foreign direct investments into the member countries.
【简答题】当渐开线齿轮的模数相等时,齿数越多,基圆直径就越 ,齿廓渐开线就越 。
【多选题】中国古代四大神话传说,除了女娲补天,还有哪些?