数据输入在实施阶段的重要性是什么？如何保证输入数据的正确性？

先天性眼组织缺损是严重的儿童致盲性眼病，有遗传倾向。这种病由胚胎期6～7周时胚裂闭合不全导致，目前该病还没有有效的治疗手段。我国医学界经过近十年的研究及调查，首次发现了导致先天性眼组织缺损的新基因ABCB6，这为今后进行基因治疗奠定了理论基础。这一医学发现说明(　　)

①善于发现人类未知领域之谜有助于改变人类的遗传规律　

②不断的实践探索是人类实现从“未知”到“有知”的源泉　

③发现事物运动过程中的规律是利用和创造规律的基本前提　

④正确的认识能够指导人们攻克医学难题

A．①②

B．①③

C．②④

D．③④

外国人入出境管理

建筑业企业资质等级分为( )。

A．总承包

B．专业承包

C．劳务分包

D．二级企业

E．一级企业

我国现行的排水系统的体制一般分为（）和（）两种。

Seasick Try Controlling Your Breathing

If you get seasick easily, you may prepare for boat rides with pressure-point bracelets, ginger, or a prescription skin patch. (1) The technique presumably works because it helps control gravity sensors in the abdomen-a lesser-known input to our fine-tuned balance system.
(2) The inner ears sense motions of the head; the eyes see where the head is; and tiny sensory organs in muscles and tendons sense where the rest of the body is. More recently, researchers have realized that sensors in many other parts of the body also play a role: in the abdomen, the lower organs, and even blood vessels. (3) But if one or two don’t match up, the brain gets confused and we become nauseated.
Scientists knew the most sickening motions closely match the rate of natural breathing; they also knew that people naturally tend to breathe in time with a motion. (4)
Researchers from Imperial College London enlisted 26 volunteers to sit in a tilting, rocking flight simulator and coordinate their breathing in various ways with the motion. (5) The natural tendency was for volunteers to inhale on every backward tilt, in rhythm with the rocking. (6) They felt even better if they breathed slightly faster or slower than the cyclic heaving of the chair; using that technique, the time until onset of nausea was 50% longer than during normal breathing.
(7) Abdominal sensors are known to send motion signals to the brain more slowly than those in the inner ear because they’re farther away from the brain and because abdominal organs have more mass, which means they resist movement a tiny bit longer. (8) But if the diaphragm opposes gravity-induced stomach motions with controlled breaths, there is less sensory conflict and less nausea. "This technique is very good for mild everyday challenges," says medical research scientist Michael Gresty, a member of the study team. "it’s completely safe, and it’s not a drug."
A. But if the subjects exhaled on every backward tilt, they didn’t get sick as quickly.
B. As long as all of these sensors send matching signals to the brain, we feel oriented.
C. Now there’s one more remedy: timing your breathing to counteract the nauseating motion.
D. So why do these tactics work
E. The brain is traditionally thought to sense body position in three ways.
F. The time lag between the two types of sensors creates a mismatch that builds up in the brain and makes us gradually sicker, the researchers say.
G. The tests lasted up to 30 minutes, or until subjects felt moderately sick.
H. But no one had ever tested whether breathing out of time with a motion could prevent nausea.