问题
单项选择题 B1型题
金银花药材粉末的显微特征是（）
A.非腺毛有单细胞及多细胞两种，油细胞众多
B.粉末中有油室、草酸钙簇晶、纤维，还可见通气组织
C.腺毛头部1～5个细胞，柄常见有1～5个细胞
D.有两种腺毛：头部倒圆锥形及头部类圆形，均为多细胞，腺柄亦为多细胞
E.有管道状分泌细胞及分泌腔
答案
参考答案：D
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金银花药材粉末的显微特征是（）
A.非腺毛有单细胞及多细胞两种，油细胞众多
B.粉末中有油室、草酸钙簇晶、纤维，还可见通气组织
C.腺毛头部1～5个细胞，柄常见有1～5个细胞
D.有两种腺毛：头部倒圆锥形及头部类圆形，均为多细胞，腺柄亦为多细胞
E.有管道状分泌细胞及分泌腔
参考答案：D
Electronic (电子的) books, or e-books, have changed the way many of us read. Now, electronic textbooks are changing the way many students 1 . Many schools in Washington have begun using online course materials for their students. Rather than using a regular textbook, it’s all online. “Our students are ready to use resources (资源) from different 2 ,” said the head teacher, Peter Noonan. He talked about the 3 of electronic textbooks to a reporter. “The world is changing 4 . Online textbooks can change right along with the things that are happening. Besides, electronic textbooks 5 less than regular textbooks. We need to pay $8 million for the regular textbooks for our students, but we only need to spend $6 million 6 the electronic textbooks,” said Peter Noonan. Students have different ideas about the change, 7 most like it. “I don’t have to carry a textbook around, so that is 8 ,” said a high school student named Melanie Reuter. Maria didn’t 9 . “I don’t like it because the Internet sometimes doesn’t work.” Some students don’t have a computer or can’t go online at home. Stephen is 10 of them. But he said, “I can go to the library, or go to a friend’s house, to go online.”
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