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【单选题】
患儿，男，3岁，生后4个月见表情呆滞，易激惹，不能抬头，伴有点头、弯腰样发作，每日约10，2岁开始出现呕吐，喂养困难，现小儿智能明显落后，毛发黄色，皮肤嫩，尿有鼠臭味，尿三氯化铁试验出现绿色，诊断为苯丙酮尿症 根据患儿临床特征，该病发生的主要机制是（ ）A.
苯丙氨酸代谢过程中酶缺陷
B.
体内有过多的苯丙酮酸
C.
苯丙氨酸在体内蓄积
D.
组氨酸羟化酶被抑制
E.
四氢生物喋呤生成不足
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【简答题】绩效考核的功能有哪些？
【单选题】听力原文： Ice dancing developed from ballroom dancing, particularly the waltz, and was very popular in the early 1900s. It requires well-trained, exact footwork conformity with one another's steps and a k...
A.
Ice dancing requires exact footwork and a keen sense of music.
B.
Partner shouldn't be raised too high or jump during ice dancing.
C.
Ice dancing needs conformity with each other and jump.
D.
Partner should be lift higher and the other be on the ice all the times.
【单选题】This is a good piece of music for us to _____. [ ]
A.
dancing
B.
dancing to
C.
dance by
D.
dance to
【简答题】A．Consult her dancing teacher. B．Take a more interesting class. C．Continue her dancing class. D．Improve her dancing skills.
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