题目1A. <img src="https://tihai-oss-cloud.itihey.com/img/d8a48bdf4ce8c22d91258ab0693c612e.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/4919351ec1fa394a5cddbf8e871fd8c1.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/f9fecc323a01be1f9d06a7c0e965ae8c.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/d17d75a6a06c18d179c4479ff2aae9b1.png">