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题目内容
（人文英语2）
There is / are ___________.
选择一项：
A. various difficulties in keeping the Internet security
B. worldwide common regulations to maintain cyberspace security
C. no serious security issues in the Internet industry
选择一项：
A. various difficulties in keeping the Internet security
B. worldwide common regulations to maintain cyberspace security
C. no serious security issues in the Internet industry
参考答案