问题
单项选择题
虫卵有卵盖
A．蛔虫
B．钩虫
C．两者均可
D．两者均不可
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
虫卵有卵盖
A．蛔虫
B．钩虫
C．两者均可
D．两者均不可
参考答案：D
| 从方框中选择适当的选项填人短文中,使短文通顺、完整.选项中有两个选项是多余选项。 | |
and l. _________a lot of time on them. But she hates math and does not work hard at it. She thinks it 2._________to learn math. She falls behind her classmates and once failed the math exam. She decides to 3._________.Her father is angry with her when he finds out about it. It was a Sunday. Mr Scott gave a call to his 4._________who teaches math in another school. He hoped she would come and teach his daughter 5._________to study math. The woman came and said, "You are a clever girl, Jane. I'm sure you can do well 6._________math if you work hard at it. " "I'm afraid I can't, Aunt," said Jane. "Girls can't be good at math. " "1 don't agree," said the woman, "I was good at it when I was a girl. You must do more exercises and practice math problems again and again 7._________ you master the subject. Remember: Practice makes 8._________. Here is a math problem. Think about it and keep working till you get it right. " "OK," said the girl, "I will try. " About an hour later Jane took the exercise book to her aunt and said, "I've done the problem ten 9. _________." "Well done!" hcr aunt said 10._________. "What result did you get?" "Ten different ones ! " |