搜题请搜索小程序“爱下问搜题”
问题 选择题

右图所示装置先放暗处一昼夜，然后用铝箔纸将甲叶片全部包裹，乙叶片不包裹。在连续照光数天后，摘下甲、乙叶片通过去除叶绿素和漂洗后，再滴加碘液。下列叙述正确的是（  ）

A．包铝箔纸的目的是为防止水分散失

B．该实验证明光合作用需要二氧化碳

C．滴加碘液之后，甲叶片呈蓝色，乙叶片呈黄白色

D．该实验证明光合作用的产物需要照光后才能由叶片合成

答案

答案：D

用锡箔包裹的叶片与不包裹的叶片进行对照，可得出光合作用的进行需要光照。

单项选择题

Because Ireland is an island geographically near the mainland of the United Kingdom, English rulers have fought since the Middle Ages to retain political control over it. Attracted by the lush farmland, English and Scottish landowners settled there, and in time of famine or political unrest, the local workers suffered, while their landlords were cushioned by their wealth. The history of modern Ireland is, in fact, largely a story of antagonism and resentment between the Irish and their English and Scottish rulers.
Since the 1920’s, Ireland has been divided into two parts: Northern Ireland (Ulster) and the Republic of Ireland (Eire). The north is still part of the United Kingdom and is predominantly Protestant; the south is ’an independent republic and is mainly Catholic. The majority in Ulster accept this political compromise, but the active and mainly Catholic minority are fighting for union with the independent republic of Southern Ireland. The IRA, the Irish Republican Army, have mounted bombing campaigns on military and civil targets in Ulster and England; they have sent letter-bombs to public figures; they have shot fellow Irishmen who support the British or belong to opposing,
and now equally militant Protestant groups. As a result of this, the British have stationed an army in Belfast, the IRA have been outlawed, and several of them have spent many years in prison or have died in support of their cause. Whether this level of violence and repression is justifiable, and whether the violence that could result from political change would be .worthwhile are the controversial issues that divide everybody involved.

According to the passage, the author’s attitude towards the Irish is______
A. militantB. intolerant C. sympathetic D. aggressive
查看答案
单项选择题

农业银行建立负债管理机制的主要目标是（）。

A.表内外一体化

B.本外币一体化

C.存款同业化

D.存款理财化
查看答案