问题
多项选择题
下列哪种情况表明树脂质量较差甚至是伪劣树脂。（）
A.颜色混杂不匀
B.颗粒大小不一、半球状颗粒较多
C.含水率较高
D.机械强度较差，用手指便能捻碎
答案
参考答案：A, B, D
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下列哪种情况表明树脂质量较差甚至是伪劣树脂。（）
A.颜色混杂不匀
B.颗粒大小不一、半球状颗粒较多
C.含水率较高
D.机械强度较差，用手指便能捻碎
参考答案：A, B, D
| 完形填空。 | |||
| "How can I learn English well?" "This is a __1__ many students may ask. In my opinion, the most effective (有效的) __2__ is to learn lessons by heart. If you can recite the text and write it out, you will learn it pretty well. And if you can tell __3__ your own words about __4__ the lesson says, you are a very successful learner indeed. Your English will be quite perfect. This is a difficult task. However, if you try to learn by heart only part of each lesson, you'll find it not so hard __5__ you might have thought. Learn this way, and you will __6__ fast progress. Of course, writing is also necessary. It helps you a lot on your way to __7__ in English studies. It's equally (同样地) important to feel the language. You should laugh at Englsih jokes and be __8__ at bad news. When using English, try to __9__ your mother tongue (母语). __10__ helping you, your own language gets in your way. So, never try to learn English through putting every word into Chinese. | |||
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