题目

I can hardly believe my eyes. What a poor composition you have _______. There are so many wrong spellings in it.  A. turned into B. turned off   C. turned to    D. turned in 答案:D 解析: turn in 意为“上交,归还”;turn into 意为“进入,(使)变成”;turn to 意为“转向,变成,求助于,致力于”;turn off 意为“关掉,避开”。种子中含有的有机物中可遇碘变蓝的是 [    ] A.蛋白质   B.淀粉   C.脂肪   D.无机盐
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