题目：
阅读理解。
My name is Jack Hill. My Chinese teacher is Li Yan. She is from Hangzhou. She has two children,
a son and a daughter. They are twins. The son is Wu Jianming. Her daughter is Wu Qiyao. Mrs. Wu
and her daughter are in Hangzhou, but her husband, Wu Wei, a doctor, is in Shenyang. Mrs. Wu's son
is in England. He is a college(大学) student. Wu Jianming and I go to the same college. We are
classmates and we are good friends. I teach him English and he teaches me Chinese.
根据短文内容，判断下列句子正误。
( )1. Wu Jianming and Wu Qiyao are twins.
( )2. Li Yan's son is a student in Shenyang.
( )3. Jack Hill and Wu Jiangming are high school students.
( )4. Li Yan's husband is a doctor.
( )5. Wu Jianming teaches Jack Hill Chinese.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：A, C解析：AC本题考核的是信用证的种类。根据是否要求受益人提交单据，信用证可以分为跟单信用证和光票信用证。
