下列细菌中属于条件致病菌的是______。
A．变形杆菌 B．肉毒梭菌C．葡萄球菌 D．伤寒杆菌E．痢疾杆菌
参考答案：A
根据句意及首字母补全单词。
1. You should throw it s _____ .
2. Let's t _____ to play this game.
3. At f _____, we must find Liu Mei.
4. I hope you can do one m _____ time.
5. Do you u _____ the word?
6. I borrowed d _____ to look up the word.
7. Let's s _____ the word together.
8. I'll do it better if I k _____ trying.
在高处往下望时，心情紧张甚至产生恐惧心理，此时更容易发生失误行为。（）
