题目

科学家发现，中草药成分中提取的“汉防己碱”能有效避免病毒进入细胞，有助于预防埃博拉感染，其分子式为C38H42N2O6。请回答： （1）汉防己碱属于     （填“无机物”或“有机物”）； （2）汉防己碱由    种元素组成，分子中氢、氧的原子个数比为     （填最简比）； （3）汉防己碱中     元素的质量分数最小。阅读短文，判断正误。 （每题2分，共10分）Last Sunday was a funny day. Liu Tao came to my home in the morning. We studied English together. We read some funny English stories. At about ten o’clock, we went to Chennan Park on foot. And we fished there. It was very interesting. We cooked lunch at about 12 o’clock and it was very nice. Then we cleaned the kitchen. We watched TV after lunch. At about 4 o’clock in the afternoon, we played pingpong.（1）Mike watched TV ________________.A. in the morning B. in the afternoon C. in the evening（2）Mike and Liu Tao went fishing __________.A. at home B. in Chennan Park C. at school（3）They went to the park _____________. A. on foot B. by bus C. by bike（4）When did they play table tennis?A.at about 4 o’clock in the morningB.at noon C.at about 4 o’clock in the afternoon（5）Who cooked lunch? ____________.A. Mike. B. Mike and Liu Tao. C. Mike’s mother.