以下哪一顶不是威胁生物多样性的原因 A.栖息地丧失 B.外来物种的入侵 C.适时

题型:选择题

问题:

以下哪一顶不是威胁生物多样性的原因

A.栖息地丧失

B.外来物种的入侵

C.适时地.有计划地进行合理采伐

D.滥采乱伐乱伐和滥捕乱杀

考点:生物多样性的内涵生物多样性面临的威胁及其原因保护生物的多样性
题型:选择题

For each blank, choose the best answer from the four choices and write down on the answer sheet.
Web browser is simply a terminal emulator, designed to display text on a screen. The two essential differences between an ordinary terminal emulator and a Web browser are that the browser knows how to deal with (71) , and that it has a mechanism for (72) graphical files. Display text, display graphics, and (73) hyperlinks—there’s 99 percent of the (74) value. That’s not to say that the manufacturers didn’t go all-out to attach a hyperactive efflorescence of useless capabilities onto their browsers. Remember when media channels in the browser were a big deal, instead of the clutter you can’t wait to delete from your favorites of bookmarks menu Remember when client-side Java applets were supposed to become the preferred (75) for application development Remember frames and all their nasty side effects

A. displayingB. illustrating C. drawingD. writing

题型:选择题

温而厉,威而不猛,恭而安。

题型:选择题

音的长短是用()来表示。

题型:选择题

某地区电站引水洞走向为N30°E,其中一段洞身由泥岩和粉砂质泥岩组成,洞壁及洞顶多为潮湿状,局部见有滴水,经量测,10m洞长每分钟出水量平均约为5L,岩石饱和单轴抗压强度平均值为28MPa,天然抗压强度平均值为32MPa,岩体较破碎;节理较发育,走向主要为N30°E,倾向NW,倾角18°,节理多微张,一般张开1~3mm,延伸多小于3m,节理面起伏粗糙并见有泥质充填;经声波测试,岩体完整性系数为0.45;该地区以水平应力为主,最大主应力为6.1MPa。

试计算其围岩总评分T和围岩强度应力比S分别为()。

A.20.5、2.0

B.23.3、2.1

C.32.3、2.1

D.45.5、2.3

题型:选择题

男性,69岁。进行性排尿困难3年,直肠指检:前列腺右叶质硬。血清PSA75ng/ml。经直肠超声检查:前列腺内低回声灶,累及右侧精囊。临床诊断前列腺癌。

根据患者情况,治疗宜采取()。

A.局部放疗

B.根治性前列腺切除术

C.根治性前列切除+放疗

D.双侧睾丸切除+化疗

E.根治性前列腺切除+化疗

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