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【判断题】
为了控制产品的等规度,可增加DONOR的加入量,越多越好
A. 对
B. 错
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答案
B
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装置目前可使用的DONOR只有一种
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TEAL和给电子体泵(P101A/B和P104A/B)不能同时停,否则丙烯会倒流堵塞混合器S203A/B和预接触罐D201
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聚丙烯熔融指数高说明氢气加入量少
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催化剂是在R200中形成活性中心的
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本装置PA301系统会残留少量烷基铝,故在倒淋或检修时需将残液排入油桶防止着火
A. 对
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A. 对
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随着氢气加入量越大,熔融指数(MFR)数值越小
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A. 对
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正常情况下,要保证丙烯洗涤塔的洗涤效果,必须要保证洗涤塔的回流流量
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( ) 30. Why did the father not ask his son not to do this and do that?    A.Because he felt quite confident of his son.    B.Because he was born from a poor family.    C.Because he was a man of few words.    D.Because he didn't want to be much too strict with his son.
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( ) 32. What may be the proper Chinese for the underlined part in the passage?    A.闲暇时光 B.学费 C.精神空虚 D.经济不足
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( ) 34. Judy Foreman copied down the phrase because she ___ . A. thought it was beautifully written B. wanted to know what it really meant C. decided to write it on a warehouse wall D. wanted her husband to put it up in the classroom
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( ) 36. What can we infer from the last paragraph? A. People should practice random kindness to those in need. B. People who receive kindness are likely to offer it to others. C. People should practice random kindness to strangers they meet. D. People who receive kindness are likely to pay it back to the giver.
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( ) 37.The greatest river for navigation is ___________. A. the Nile B. the Amazon C. the Mekong D. the Mississippi
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( ) 38. From a dam, people can use the water for ___________. A. keeping the rivers clean B. only making electricity C. irrigation and making electricity D. washing clothes
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( ) 39. The water in the river is polluted because of _____________. A. people's drinking water too much B. people's swimming in the river too much C. chemicals and other materials D. people's building a dam across a river
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