女，56岁，发现高血压6年，无明显诱因突感胸部刀割样剧烈疼痛1h，并向胸背部放射，伴

— Tom, could you go to the supermarket with me?

— I’d like to, but my homework ______ and I have to hand it in tomorrow.

A．wasn’t finished

B．won’t be finished

C．hasn’t been finished

D．hadn’t been finished

化学烧伤( )

A．创面界限分明，渗出少，水肿轻
B．创面由于组织脱水而形成硬焦痂
C．皮损有一定的潜伏期，发展缓慢而后果严重
D．坏死组织含水量多，早期不会形成焦痂
E．创面呈黄色

讯问犯罪嫌疑人时，犯罪嫌疑人应讲清有关事实，不能作无罪的辩解。( )

关于面弓低位口外后方牵引矫治器的描述，下列哪项不正确

A．推上颌磨牙向远中

B．适用于下颌平面角较大的安氏Ⅱ类错牙合

C．能抑制上颌骨的向前生长发育

D．适用于安氏Ⅱ类错胎，下颌面角小者

E．在拔牙病例中用于加强上颌磨牙支抗

(A) 条件(1)充分，但条件(2)不充分．
(B) 条件(2)充分，但条件(1)不充分．
(C) 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．
(D) 条件(1)充分，条件(2)也充分．
(E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．

A university awarded grants in the amount of either $7, 000 or $10, 000 to some incoming freshmen. The total amount of all such awards was $2, 300, 000. Did the university award more $ 7,000 grants than $10,000 grants to its incoming freshmen
(1) A total of 275 freshmen received grants in one of the two amounts.
(2) The amount of money awarded in $10,000 grants was $200,000 more than the amount of money awarded in $7,000 grants.