生活在水中的生物的形态和结构与水生环境相适应。 [ ]_爱下问搜题

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问题判断题

生活在水中的生物的形态和结构与水生环境相适应。 [ ]

答案

√

完形填空

完形填空（共20小题；每小题1.5分，共30分）
阅读下面短文，从短文后所给的A、B、C、D四个选项中选出可以填入空白出的最佳选项。
After 42-year-old guy Tom had quitted his job, he began to make up his mind to become a freelance (self-employed) writer, no one could tell for sure whether he would succeed or not．He found a cold storage room in a building, set up a(n) 21 typewriter and settled down to work．
After a year or so, however, Tom began to 22 himself．He found it was difficult to earn his living by 23 what he wrote．But Tom determined to put his dream to the test — 24 it meant living with uncertainty and fear of 25 ．This is the shadowland of hope, and 26 with a dream must learn to live there．
One day Tom got a call, “We need a(n) 27 , and we’re paying $6,000 a year．” $6,000 was 28 money in 1960．It would enable Tom to get a nice apartment, a used car and more． 29 , he could write on the side． 30 the dollars were dancing in Tom’s head, something 31 his senses．He had dreamed of being a 32 — full time．“Thanks, but no,” Tom said 33 ．“I’m going to stick it out and write．”
After Tom got off the phone, he 34 everything he had: two cans of vegetables and 18 cents．Tom put the cans and cents into a 35 bag, saying to himself, “There’s everything you’ve made of yourself so far．”
　　Finally his work was 36 in 1970．Instantly he had the kind of fame and success that 37 writers ever experience．The shadows had turned into limelight．
　　Then one day, Tom 38 a box filled with things he had owned years before． 39 was a paper bag with two cans and 18 cents．Suddenly he 40 himself working in that cold storage room．It reminds Tom, and anyone with a dream, of the courage and persistence it takes to stay the course in the shadowland．

D．appreciating

D．Even though

C．perspiration

B．pulled apart

C．pulled back

D．pulled down

单项选择题

能量通过约1.5亿km的空间到达地球的大气层附近时，其辐射能量密度约为（），这个值叫太阳常数。

A、1.8kw/m²

B、1kw/m²

C、2kw/m²

D、1.4kw/m²