问题
单项选择题
测得两色谱峰的保留时间tR1=6.5min，tR2=8.3min，峰宽W1=1.0min，W2=1.4min，则两峰的分离度为R为（）。
A、0.22
B、1.2
C、2.5
D、1.5
E、0.75
答案
参考答案：D
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测得两色谱峰的保留时间tR1=6.5min，tR2=8.3min，峰宽W1=1.0min，W2=1.4min，则两峰的分离度为R为（）。
A、0.22
B、1.2
C、2.5
D、1.5
E、0.75
参考答案：D
| Children’s Museum of Indianapolis We are the largest children’s museum in the world. Hours Monday: Closed (闭馆) Tuesday — Sunday, 10 a.m. — 5 p.m. Admission (门票费) Children (ages 2 — 17): $13.50 Adults (ages 18 — 59): $18.50 Seniors (60+): $17.50 Children under 2 and members: Free Parking (停车) Free parking is available. Call us: 800-820-6214 |
| Minnesota Children’s Museum Let children learn through play. Hours Monday: Closed Tuesday — Thursday: 9 a.m. — 4 p.m. Friday & Saturday: 9 a.m. — 8 p.m. Sunday: 9 a.m. — 5 p.m. Admission Ages 1—101: $9.50 Children under one and members: Free Parking 3-hour parking only $4 Call us: 651-225-6000 | ||
| Chicago Children’s Museum Improve children’s lives by creating a place where playing and learning connect (结合). Hours Friday — Wednesday: 10 a.m. — 5 p.m. Thursday: 10 a.m. — 8 p.m. Admission Children & adults: $14 Seniors: $13 Children under one and members: Free Call us: 312-527-1000 | ||
| Children’s Museum of Houston “America’s No. 1 Children’s Museum”by Parents magazine. Hours Monday: Closed Tuesday — Saturday: 10 a.m. — 6 p.m. Sunday: 12 a.m. — 6 p.m. Admission Adults / Children (Ages 1+): $9.00 Seniors ( Ages 65+): $8.00 Children under one and members: Free Parking 1 hour: $6.00 2 hours: $7.00 3+ hours: $8.00 Call us: 713-522-1138 | ||
A．651-225-6000
B．800-820-6214
C．312-527-1000
D．713-522-1138小题2:Mr. and Mrs. Lee want to take their two 10-month-old sons to the Minnesota Children’s Museum, and they are not members. They should pay _____.
A．$9.50
B．$19
C．$28.50
D．$38小题3: Mr. Green parked his car in the parking space of Children’s Museum
of Houston for two hours; he should pay _____.
A．$4
B．$6
C．$7
D．$8小题4: The Whites want to visit a children’s museum at 6:30 p.m. on Thurs-
day; they could go to _____.
A．Chicago Children’s Museum
B．Minnesota Children’s Museum
C．Children’s Museum of Houston
D．Children’s Museum of Indianapolis小题5: What do the four children’s museums have in common?
A．They are free for members.
B．They are not open on Monday.
C．They all provide their parking information.
D．Children’s tickets are cheaper than seniors’.