患者男性，53岁，大便带血伴消瘦2个月余，怀疑结肠癌。18F-FDGPET/CT显像

句型转换

小题1:Tom has never come to school,                 ? (改为反意疑问句)

小题2: Lisa's brother goes to the cinema twice a week. (对划线部分提问)

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小题3: I didn't know. Where is your home? (变为含宾语从句的复合句)

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小题4:Sam made this model plane last year. (变为被动语态)

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小题5:I used to get up early in the morning. ( 改为否定句  )

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按原则来说，学生参加勤工助学的时间原则上每周（）。

A、不超过8小时

B、必须满8小时

C、超过8小时

D、不超过40小时

书香星城"211"工程的具体任务是什么？

按照逻辑结构分类，结构可以分为线性结构和非线性结构，栈属于______。

The decision whether to add capital equipment to the production process should be based on:（）

A. future value, using the cost of financial capital as a benchmark.

B. present value, using the marginal revenue product of capital as a benchmark.

C. present value, using the cost of financial capital as a benchmark.