最适合作润湿剂的HLB值是A．HLB值在1～3 B．HLB值在3～8 C．HLB值在 发布时间：2017-06-03 14:30 │ 来源：www.tikuol.com 题型：单项选择题 问题： 最适合作润湿剂的HLB值是A．HLB值在1～3B．HLB值在3～8C．HLB值在7～15D．HLB值在9～13E．HLB值在13～18
题型：单项选择题 完形填空。 Li Lei gets an e-mail __1__ Jackson Wilson. Jack is a high school student in Canada. He wants to __2__Chinese.Dear friend, My name is Jack Wilson. I am from Toronto, __3__. I am 13 years old. I'm a schoolboy. I know China is a great __4__. I want to __5__ friends in China and I want to learn Chinese. There are nineteen students in __6__ class. My classmates are from six countries. They are learning English. My parents are from France. They __7__ French. I speak English and French. There are many Chinese __8__ in Toronto. I want to learn Chinese, __9__ I don't have any Chinese textbooks. Could you __10__ me? Please write back soon. Thank you. Jack Wilson( ) 1. A. for ( ) 2. A. teach ( ) 3. A. Canada ( ) 4. A. city ( ) 5. A. have ( ) 6. A. his ( ) 7. A. speak ( ) 8. A. there ( ) 9. A. so ( ) 10. A. give B. to B. study B. Japan B. countryB. take B. your B. tell B. here B. and B. help C. from C. speak C. AustraliaC. people C. give C. my C. say C. peoples C. for C. write D. of D. know D. France D. school D. make D. their D. talk D. student D. but D. leave 查看答案
题型：单项选择题 三七的性状特征是（） A．根略呈纺锤形或类圆锥形 B．顶端有茎痕，周围有瘤状突起，侧面有支根断痕 C．质坚实，击碎后皮部与木部常分离 D．断面皮部有棕色树脂道斑点 E．气微，味甜 查看答案