题目内容

It is sometimes possible to have a boat ride.

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Things which used to be used in the House are part of the exhibition.

Genetic engineering, the process of splicing (连接)
together DNA from different organisms to create a preferred
type of plant or animal, is a relatively new development
in agriculture. The first successful experiment
was achieved in 1973. Despite of its recent emergence, 【S1】
however, genetic engineering--particularly in the area of
agriculture--has proliferated swiftly. Few Americans can
now avoid genetically altered food altogether, but it's 【S2】
estimated that modified ingredients are present in about two-thirds
of the foods in American supermarkets.
Supporters of genetic engineering have argued that
this application of science allows farmers to grow crops
more efficiently and to save money on pesticides and fertilizers.
Fewer chemicals, they say, will be benefit for 【S3】
the environment and reduce health risks for farm workers.
Opponents of genetic engineering make the claim
that scientists are tampering (损害) with matters that
they know too little and essentially committing a crime 【S4】
against nature. It's impossible, they maintain, for people
to see the possible consequences that genetic engineering 【S5】
could wreak (带来) on the environment and on the
health of human beings. 【S6】
Greenpeace activists objected on farmers' use of corn
that had been genetically modified to resist corn borers
(玉米螟)--pests that were costing farmers up to a billion 【S7】
dollars a year in mined crops. No one admitted that
the genetic change had benefited the corn plants. But
how would it impact upon the rest of the environment？
Studies variously supported both sides of the argument 【S8】
, and thus proved conclusive. However, the protest
cut to the heart of the genetic engineering controversy by 【S9】
demonstrating what unprepared both the scientists and
their opponents were to gauge (测量, 评估) the long-term
effects of introducing changes into living beings.
Perhaps, like most forms of technological innovation, genetic
engineering will come to display both its benefits 【S10】
and obvious drawbacks--many of which will be so apparent
until mankind has pursued the experiment for some
time.
【S1】

Part A
You go to the railway station to meet one of your friends, and the train has not arrived yet, so you have to leave him a note on the clipboard, from which he will learn 'how to find you.
You should write approximately 100 words. Do not sign your own name at the end of the note. Use "Li Ming" instead.

设有如下窗体单击事件过程：
Private Sub Form Click()
x=1
For i=1 To 3
Select Case I
Case 1,3
x=x+3
Case 2,4
x=x-2
End Select
Next I
MsgBox x
End Sub
打开窗体运行后，单击窗体，则消息框的输出结果是______。