The fetal lungs are capable of breathing after ( ). A: 20 weeks' gestational age B: 24 weeks' gestational age C: 28 weeks' gestational age D: 32 weeks' gestational age E: 16 weeks' gestational age

Which of the following are the risk factors of ROP? A: Low birth weight B: Low gestational age C: High oxygen therapy D: Comorbidities

Gestational choriocarcinoma is a lowly invasive tumor.

Gestational choriocarcinoma is a highly invasive and frequently metastatic tumor.

Gestational diabetes is diabetes that develops or first occurs during pregnancy.

Market segmentation is dividing the large market into small groups based on ( ). A: Same age B: Same income C: Common interests D: Shared characteristics

下面哪一个表达式能正确表示逻辑关系："age≥18 或age≤60"？ A: age>=18 || age B: age>=18 or age C: age>=18 | age D: age>=18 && age

表达式“AGE BETWEEN 18 AND 24”等价于 A: AGE>18 AND AGE<24 B: AGE>=18 AND AGE<24 C: AGE>18 AND AGE<=24 D: AGE>=18 AND AGE<=24

设有关系表S(NO，NAME，AGE)，其中AGE为年龄字段，则表达式AGE NOT BETWEEN 18 AND 24等价于（） A: AGE＜=18 OR AGE＞=24 B: AGE＜=18 0R AGE＞24 C: AGE＜18 OR AGE＞=24 D: AGE＜18 0R AGE＞24

与WHERE AGE BETWEEN 18 AND 23完全等价的是（） A: WHERE AGE＞18AND AGE＜23 B: WHERE AGE＞＝18AND AGE＜23 C: WHERE AGE＞18AND AGE＜＝23 D: WHERE AGE＞＝18AND AGE＜＝23