几十年前,新西兰有一个牧场的大片牧草长势很弱,有的甚至发黄枯萎,即使施用了大量氮

题型:选择题

问题:

几十年前,新西兰有一个牧场的大片牧草长势很弱,有的甚至发黄枯萎,即使施用了大量氮肥、磷肥、钾肥也无济于事。后来,人们偶然发现牧场内的一小片牧草长得十分茂盛。原来,这一小片“绿洲”的附近有一座钼矿,矿工上下班总是抄近路走,他们的鞋子上粘有钼矿粉,正是矿工鞋子踩过的地方的牧草长得绿油油的。经过科学家的化验和分析,一公顷牧草只需150g钼就足够了。下列关于这一现象的解释,正确的是[ ]

A.钼是植物必需的大量元素

B.钼是植物必需的微量元素

C.钼在植物生长发育过程中的作用是可以替代的

D.钼是一种高效肥料,只要有了钼,植物就能正常生长

考点:植物的矿质营养
题型:选择题

完成句子(共10小题;每小题1.5分,满分15分)

小题1:The relatives of the victims in the earthquake asked for£43 million from the seven experts

                 (被指控) failing to give enough warning about the disaster.    (accuse)

小题2:It was on the day before the press conference                                    (他们安排作家) to meet a number of readers.                                   (arrange)

小题3:                      (系牢安全带) or your next sleep will be the last one.   (keep)

小题4:Sometimes you are too proud because you do not want your parents               (赞同) what you do as if you were an underdog.                                    (approve)

小题5:All my efforts                    (非常集中于) the hard task that I wasn’t able to spare any time for other jobs.                                              (concentrate)

小题6:The online research-based study demands that a report of at least 300 words              

        (要完成) by each student, or they shall not get the credit.           (accomplish)

小题7:Angry fans argue that seldom                   (球队获胜) a match so far and that they can hardly tolerate their awful performance any more.                           (win)

小题8:                   (这部电影吸引我的是) was not the poor story plot but the amazing vision effect on 3-D screens.                                       (attract)

小题9:                 (背弃) on the food safety rules, the greedy merchants should add “gutter oil” to people's food, which dirties China's food reality.                      (turn)

小题10:You cannot be too careful, because the more enthusiastic the stranger appears,             

(越有可能) he is to take you in.                                             (likely)

题型:选择题

It was a matter of ____________ would take the position. 

A.who

B.whoever

C.whom

D.whomever

题型:选择题

下列选项中不属于智力的是()

A.观察力

B.记忆力

C.想象力

D.意志力

题型:选择题

根据《水利水电建筑安装安全技术工作规程》(SD 267—88),对接触粉尘、毒物浓度比较高的工人,应每隔( )个月进行一次身体检查。

A.2~3
B.3~4
C.4~5
D.6~12

题型:选择题

某厂一月份电费总额为6万元,当月逾期交费天数为20天;另去年12月份电费未交,总额为9万元。试求该厂去年12月和今年1月共应交电费M是多少?

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