海水是巨大的资源宝库,下列说法正确的是 A.碘元素又称“海洋元素” B.镁是海水

题型:选择题

问题:

海水是巨大的资源宝库,下列说法正确的是

A.碘元素又称“海洋元素”

B.镁是海水中含量最多的金属元素

C.从海水中提取食盐和碘的过程都是物理变化

D.氯碱工业和纯碱工业的原料都有食盐

考点:光导纤维新型材料(新型陶瓷、单晶硅等)塑料、纤维、橡胶复合材料
题型:选择题

Corporate officers and directors commonly buy and sell, for their own portfolios, stock in their own corporations. Generally, when the ratio of such inside sales to inside purchases falls below 2 to 1 for a given stock, a rise in stock prices is imminent. In recent days, while the price of MEGA Corporation stock has been falling, the corporation’s officers and directors have bought up to nine times as much of it as they have sold.
The facts above best support which of the following predictions

A.The imbalance between inside purchases and inside sales of MEGA stock will grow even further.

B.Inside purchases of MEGA stock are about to cease abruptly.

C.The price of MEGA stock will soon begin to go up.

D.The price of MEGA stock will continue to drop, but less rapidly.

E.(E) The majority of MEGA stock will soon be owned by MEGA’s own officers and directors.

题型:选择题

诗文默写与课外积累。

①____________,关山度若飞。(《木兰诗》)

②____________,对影成三人。(李白《月下独酌》)

③人生自古谁无死?____________。(文天祥《过零丁洋》)

④晴川历历汉阳树,____________。(崔颢《黄鹤楼》)

⑤了却君王天下事,____________。(辛弃疾《破阵子》)

⑥关关雎鸠,在河之洲。____________,君子好逑。(《诗经·关雎》)

⑦子曰:“岁寒,____________。”(《论语》)

⑧假如生活欺骗了你,不要悲伤,不要心急!____________:相信吧,快乐的日子即将来临。(普希金《假如生活欺骗了你》)

⑨螳螂捕蝉,____________。(课外积累)

题型:选择题

随总体经济成长,上市公司利润持续上升,股息不断增长,企业经营环境不断改善,产销两旺,投资风险也越来越小,从而公司的股票和债券全面得到升值,促使价格上涨。( )

A.

A.正确

B.

B.错误

C.

C.放弃

题型:选择题

误差传播定律是计算()中误差公式。

A.算术平均值

B.加权算术平均值

C.直接观测量

D.直接观测量的函数

题型:选择题

GSM系统可以分为四大子系统,分别是:移动台、()、基站子系统、()

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