企业客户证书实际为企业操作员证书，企业客户至少要配备（）个操作员。
A、2
B、3
C、4
D、5
参考答案：A
下列词语中共有4个错别字，一一找出并改正在横线上。
⑴柔蔓 ⑵绿阴如盖 ⑶新陈代谢 ⑷分道扬镖
⑸褴褛 ⑹浮想联篇 ⑺迥然不同 ⑻寻根问底
⑼拮据 ⑽不惜工本 ⑾心往神弛 ⑿如愿以偿
改正：____________ ____________ ____________ ____________
Annie Jump Cannon, ________ discovered so many stars that she was called "the census taker of the sky".
A．a leading astronomer,
B．who, as a leading astronomer,
C．was a leading astronomer,
D．a leading astronomer who
