True or False : If [img=52x32]1802ddd740eab2f.png[/img] does not exist and [img=51x32]1802ddd748fbd7e.png[/img] does not exist either, then [img=94x33]1802ddd750d8d30.png[/img] does not exist. A: True. B: False. C: - D: -

If [img=67x35]1803e23a529c456.png[/img]exists and [img=67x35]1803e23a5bdddbb.png[/img] does not exist，then [img=134x35]1803e23a638f5a2.png[/img] must not exist.

3. Let [img=161x53]1802dde8d59661c.png[/img] and [img=180x61]1802dde8df7d956.png[/img].Determine whether [img=62x33]1802dde8e7e5fb9.png[/img] and [img=61x33]1802dde8f088425.png[/img] exist or not. A: (A) [img=62x33]1802dde8f81f6da.png[/img] and [img=61x33]1802dde8ff2f966.png[/img] both exist. B: (B) [img=62x33]1802dde8f81f6da.png[/img] exists but [img=61x33]1802dde8ff2f966.png[/img] does not exist. C: (C) [img=62x33]1802dde8f81f6da.png[/img] does not exist but [img=61x33]1802dde8ff2f966.png[/img] exists. D: (D) [img=62x33]1802dde8f81f6da.png[/img] and [img=61x33]1802dde8ff2f966.png[/img] do not exist.

The most important guideline for decodin...nary does not exist.

exist

If it weren’t for Rachel Carson，the environmental movement（）today。 A: should not exist B: might not exist C: should not have existed D: might not have exist

Under the direct write-off method, allowance for Uncollectible accounts does not exist.

When Julius Caesar invaded Britain in 55 A.D., English did not exist.

Risk of collision may exist ______.

Chinese dragons exist factually