搜题请搜索小程序“爱下问搜题”
问题 单项选择题 A1/A2型题

721型分光光度计在使用时发现波长在580nm处，出射光不是黄色，而是其他颜色，其原因可能是（）。

A.有电磁干扰，导致仪器失灵

B.仪器零部件配置不合理，产生实验误差

C.实验室电路的电压小于额定值

D.波长指示值与实际出射光谱值不符合

E.实验室电路的电压高于额定值

答案

参考答案：D

单项选择题

请根据下面短文回答：
Open Time: 9:00 to 17:00 Tuesdays through Sundays(sales stop at 16:00)
Ticket Prices: Full Price: RMB 30; Half Price: RMB 15
Free invitation tickets are distributed every Wednesday and shall not exceed the approved quota. The corresponding policies are:
· 200 invitation tickets are freely distributed to the public every Wednesday.
· Visitors shall go to the bamboo courtyard on the first underground floor east to pick up invitation tickets according to the order of the telephone reservation from 8:30 to 11:00 a.m. every Wednesday.
· Staff of the museum will distribute the 200 free invitation tickets based on the order of the telephone reservation until the quota is used up.
· Visitors shall get the free invitation ticket by using their valid certificate.
Distribution is limited to per person.
· Visitors using the free invitation ticket cannot visit the special exhibitions.
Tickets are only valid on the date indicated.
Year-round Free Admission Policies.
· Retired people with the provision of their certificates of retirement
· Disabled people with the provision of their certificates of disability
· Disabled soldiers with the provision of their certificates of disability
· Staff working in the culture and museum systems with the provision of their employment certificates
· Children less than 120 cm in height and accompanied by adults (those without adult accompaniment will not be admitted and the accompanying adult must purchase a ticket as per regulations)
Routes:
Subway: Muxidi Station, Line 1
Buses: No.1, No.4 and Special Bus No.1 to the stop "Muxidi".
Reservation Telephone: 63370491 63370492

The museum is open______.
[A] from Monday to Sunday
[B] from Tuesday to Sunday
[C] on Tuesday and Sunday
查看答案
问答题 简答题

牛的卵巢的形态及在体内的位置如何？
查看答案