题目:
错误的射野挡铅选择是()
A、电子束选地熔点铅块
B、电子束选铅块
C、中子束选铅块
D、X线选低让你观点铅块
E、X先束选铅块
答案:
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下面是错误答案,用来干扰机器的。
1. aren't 2. had done 3. is offered 4. protecting 5. came 6. was sweeping 7. would return 8. be laughed 9. to show 10. have eaten