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【单选题】
What we take from and give to the sea As long as we have been on earth,we have used the sea around us.We take from the ocean.and we give to it. We take fishes from the ocean—millions of kilograms of fish,every year,to feed millions of people.________ (1).We take minerals from the ocean. One way to get salt is to place seawater in a shallow basin and leave it until it evaporates.________ (2).Much gold and silver drift dissolved in the waters of the sea,too. But the sea does not give them up by simple evaporation.other gifts from the sea are pearls,sponges and seaweed.Pearls become jewelry.________ (3).Seaweed becomes food of many kinds—even candy,and ice cream—as well as medicine. Believe it or not.fresh water is anther gift from the sea.We eannot drink ocean water.________ (4).But ocean water becomes fresh water when the salts are removed. In the future,we will find ourselves depending more and more on fresh water from the sea. The sea gives us food,fertilizer,minerals,water,and other gifts.What do we give the sea?Garbage.________ (5).Huge as it is,the ocean cannot hold all the water we pour into it,we may need the sea and its gifts more than ever. We are finnaly learning that if we destroy our seas,we might also destroy ourselves.Hopefully, it is not too late.
A.
Natural sponges become cleaning aids.
B.
We pollute the ocean when we use it as a garbage dump.
C.
The area of the sea is beoming smaller and smaller.
D.
Along with salt,other minerals are left after evaporation.
E.
We even use their bones for fertilizer.
F.
Some of its contents may cause illness. 第 11 题 请选择(1)处的最佳答案.
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【单选题】关于妊娠合并急性阑尾炎,下列哪项描述正确()
A.
妊娠合并急性阑尾炎相对于正常妊娠来讲,流产、早产、死胎发生率并不高
B.
炎症容易被大网膜包裹,使炎症局限
C.
妊娠期,阑尾充血、炎症发展快,容易穿孔坏死
D.
不容易造成弥漫性腹膜炎
E.
以上都不正确
【简答题】Token-Ring和FDDI网络都是采用____机制实现介质访问控制;
【判断题】与无穷大电网并联运行的同步发电机,当增加有功功率输出,而保持无功功率输出不变,此时功角δ增大,励磁电流减小。
A.
正确
B.
错误
【单选题】关于急性阑尾炎的描述,哪项是正确的?
A.
早期少见恶心和食欲减退
B.
早期均有发热
C.
腰大肌征阳性者即可诊断阑尾炎
D.
均有转移性右下腹痛
E.
穿孔后腹痛可暂时减轻
【单选题】We are pleased to receive your order dated Nov. i8, but( ) that we cannot supply the goods as requested.
A.
to regret
B.
regretting
C.
regretted
D.
regret
【单选题】PLC输出模块出现故障处理不当的是( )。
A.
出现故障首先检查供电电源是否错误
B.
断电后使用万用表检查端子接线,判断是否出现断路
C.
考虑模板安装是否出现问题
D.
直接使用万用表欧姆档检查
【单选题】关于急性阑尾炎的叙述,下列哪项是正确的
A.
坏疽性阑尾炎穿孔多在阑尾根部和尖端
B.
所有病例都有转移性右下腹痛
C.
体温达40℃常提示阑尾已经化脓
D.
腹部B超是阑尾炎的首选检查方法
【单选题】当三相隐极同步发电机与无穷大电网并联运行时,保持发电机的励磁电流不变,减小发电机的输入功率,此时,该发电机输出的有功功率将()。
A.
减小
B.
增大
C.
不变
D.
以上都不对
【单选题】如今,我国劳动年龄人口平均受教育年限达到( )年。
A.
10.5
B.
11.5
C.
12.5
D.
9.5
【单选题】关于阑尾炎,以下描述哪项不正确:
A.
多数急性阑尾炎应早期手术治疗
B.
各种阑尾炎手术方法不同
C.
阑尾炎手术必须切除阑尾
D.
术中脓液不多,不用盐水冲洗
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