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问题 单项选择题

在调拌模型材料过程中，调拌时间过长或中途加水再调拌产生的主要不良后果是

A．容易产生气泡
B．降低流动性
C．造成脱模困难
D．使模型表面粗糙
E．降低抗压强度

答案

参考答案：E

单项选择题

某建设项目，取折现率i1=10%时，净现值N[PV1=200万元；取折现率i2=15%时，净现值NPV2=-100万元，用内插法求得其财务内部收益率近似等于（）。

A．14%

B．13.33%

C．11.67%

D．11%
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填空题

The problem is my weight. I’m just 1.57 meters high, but 61. ______
my weight is 75 kilos. Many students often make a fun 62. ______
of me. Some boys were unfriendly for me—they call63. ______
me "meat ball". That makes me to feel unhappy. 64. ______
Although I’m a bit too fat, yet I feel very well. I65. ______
enjoy my meal. I love eating meat very much. And I like 66. ______
sweet food, though. I often have sugar with tea, milk. In 67. ______
the past two months I had put on 5 kilos. So I’m becoming 68. ______
more and more worried this problem, but I don’t 69. ______
know to lose weight quickly. Could you help me, dear doctor 70. ______
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