题目2A. <img src="https://tihai-oss-cloud.itihey.com/img/3a851abd7f7762fa26a73a9d6730c0d3.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/60044bfb23971a52806635364bdf8092.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/0dde22023a119afb897346e72c59e3d7.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/ad507f992f4df20982968ce6e09eacc2.png">